Update 2: Given how this is now seen as a reference point for the hot bloggers on FriendFeed, we're going to try and keep it updated. Added in this round includes folks like Allen Stern of CenterNetworks, Tris Hussey, Chris Pirillo and others...
I think that there are still other opportunities for marketing companies to leverage Social Media. It isn't just to use social media as a feedback tool - that is but one of the many marketing objectives that may cause a company to engage in a social media